The first person to blame might be at the top.
The Obama administration supplied a couple thousand al-qaeda with weapons and other support in rebel controlled eastern Libya. The U.S had no problem arming terrorists to do it's bidding. Then these same people he armed over ran us at the consulate in Benghazi. A bad decision was made, then everyone disengaged after they were begging for help. Rumor has it the national security council made our leader/leaders aware who they were arming. Our CIA and other countires also blew this revolution up to make it look like something it was not. The whole thing stems from Gaddafi pushing proposals that would have hurt the financial systems and western economies...so basically...our people were sacrificed in this little cover up, it was decided to arm terrorists and over throw the Libya government, and basically they got replaced with terrorists.
So it runs downhill to Hillary...but as worthless as our government agencies are, it did not start with her. It's just crap running downhill, it will likely get past Hillary and eventually the crap will turn to stink and nobody will be able to do anything about it, anymore than we could about the BATF running guns across the border. We are actually helpless to stop our out of control government agencies...all we can do is watch and comment. Someday I suppose we won't be able to comment either. So just in case...the above is all just rumors I have heard, for the record I am not saying any of it is true.